FPL'2014 - FlexTiles Workshop - 4 - FlexTiles Virtual Platform
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The document provides a detailed overview of the Flextiles virtual execution platform developed by the Flextiles consortium, highlighting its hardware and software components, resource management, and the transition from static to dynamic execution. It discusses the use of virtual resources, managing applications at runtime, and the implications of dynamic loading on the system. The information also mentions acknowledgments of the platform's development over the past decade and outlines various technical aspects related to its operation and application execution.
FPL'2014 - FlexTiles Workshop - 4 - FlexTiles Virtual Platform
- 1. www.flextiles.eu FlexTiles Virtual Execution Platform Eindhoven University of Technology
- 2. 2 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 TOC •CompSOC Platform •CompSOC Flextiles: static goes dynamic •Introduction to the FlexTiles Platform: Hardware/Software •Managing the different resources •Virtual Execution Platform •Dynamic loading of an application
- 3. 3 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 CompSOC – The Platform CompSOC Platform •Heterogeneous Multi Processor platform •Composable, analyzable and predictable •NoC •Processor tile •DDR Memory controller •Template based fully automated hardware flow •Flexible software layer: •Runs on: •CompSOC platform •OVP (Flextiles) •ARM Cortex M •Linux •External IO •Etc.
- 4. 4 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 CompSOC - Acknowledgements CompSOC: •Development for more than 10 years •Different parts of the platform have been and are part of many EU-projects
- 5. 5 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 CompSOC - FlexTiles In FlexTiles project: • CompSOC goes from static to dynamic
- 6. 6 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Static Static •Resource constraints verified off-line •Application code available in platform from bootup •Applications setup at start-up •Applications never removed or modified But we have: •Composable platform: full-isolation between applications •Run-time programmable resources: NoC, GPP, etc.
- 7. 7 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Dynamic Dynamic •Resource constraints verified at run-time •Online computation of resource configuration •Run-time (re-)programming of resources •Application code loaded during run-time •Application initialization at run-time •Applications are removed or modified.
- 8. 8 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Interlude Introduction: •FlexTiles Hardware Platform and software stack •Model of Computation
- 9. 9 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Introduction to the FlexTiles Platform: Hardware/Software Proc clk host bridge software Comik μkernel interrupt handler exception handler scheduler main int exc resource manager DRAM BM driver NOC BM driver DSP BM driver eFPGA BM driver tile BM proc BM driver VEP BM DMA BM driver space+time I+DMEMs DMAs + CMEMs virtual wires space+time S/DRAM virtual processors space+time I+DMEM DMA + CMEM DSP space+time S/DRAM virtual processor virtual platform (multiple heterogeneous virtual resources) boot loader application QoS & power management actor/process/job/thread code Actor code RTOS (pOSe ) DF/... application interrupt handler exception handler scheduler main int exc applications I/O eFPGA
- 10. 10 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Introduction to the FlexTiles Platform: Software Software CoMik Processor Virtualization Cycle accurate partitioning FIFOs Software view to NoC Race-condition free communication. protocol (C-Heap) Flexible mapping CompOSe Real-time OS Cyclo-static dataflow Programming model Analyzable
- 11. 11 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Introduction to the FlexTiles Platform: Software Programming Model: CSDF (Extended for Flextiles)
- 12. 12 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Introduction to the FlexTiles Platform: Software Programming Model: CSDF
- 13. 13 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Virtual Execution Platform First thing when loading application: Virtual Execution Platform •Set of (virtual) resources that form a platform capable of executing an application. space+time I+DMEMs DMAs + CMEMs virtual wires space+time S/DRAM virtual processors space+time I+DMEM DMA + CMEM DSP space+time S/DRAM virtual processor main int exc DSM I/O eFPGA
- 14. 14 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Virtual Execution Platform What is a virtual resource? •A full or shared hardware resource •Sharing should be predictable and composable •Described by a budget: •E.g. 20% of the Processor •1 DMA •75 kbyte of data memory
- 15. 15 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Managing Resources Each resource is different, lets try to abstract this: Reserve Allocate Re-allocate Enable Disable Virtual Resource Reserved Virtual Resource Idle Release Virtual Resource Running Virtual Resource Description
- 16. 16 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Managing Resources Reserve Allocate Re-allocate Enable Disable Virtual Resource Reserved Virtual Resource Idle Release Virtual Resource Running Virtual Resource Description Resource Description: •Budget •Memory Size (imem/dmem) •#of slots •Bandwidth/Latency •Configuration •Max CPU frequency •Delay
- 17. 17 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Virtual Execution Platform Full Virtual Platform:
- 18. 18 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Virtual Platform Management This extends to Virtual Execution Platform Virtual Platform Running FRT dataflow Appl. manager T1 T2 T3 task sch.+FR Virtual Platform Description Virtual Platform Description Reserve Allocate Re-allocate Enable Disable Virtual Platform Reserved Virtual Platform Idle Release FRT dataflow (eFPGA) T4 FRT dataflow (dsp) T5
- 19. 19 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Resource Management Framework Resource Management Framework have been developed •One (clean) API for managing Virtual Resources. •API should be independent of actual underlying resource •Uses object inheritance to enforce this. •Validation/Verifications •User space API •Allows application to interface with (virtual) resource. •Validates & Verifies •API execution time should be predictable and composable •Debug/Inspect API •Provides information to the developer •Gives Virtualization Layer insight System User Debug Budget Manager Driver
- 20. 20 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 We now have a Virtual Execution Platform? How to boot it? •No code in the platform: •DSP gets loaded by the Resource Manager. •eFPGA via the reconfiguration manager in the eFPGA layer •GPP •Shared resource.
- 21. 21 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Dynamic Loading on GPP Loading applications at run-time: Sound easy? It ain’t. •Every memory should be managed •No MMU •Need position independent code. (PIC) •Compiler severely broken •In place code patching •Loading should be safe •Loading should not affect the running system. •Loading should not be affected by the running system.
- 22. 22 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Putting Things Together Application Bundles •Executable and Linkable Format (ELF) •Loadable code •GPP Instruction/data •eFPGA virtual bitstream •DSP instruction/data •Memory •platform description •Resource requirements •Reconfiguration information •Description of configurations •Supporting code Application Bundlesubbundle1subbundle2Platform DescriptionGPP 1GPP 2NoCDSP 1DSP 2eFPGAPlatform DescriptionGPPDMAMemoryeFPGADSPDSPGPP CodeMemory Image
- 23. 23 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification
- 24. 24 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading 1a application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP
- 25. 25 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading 1b boot loader application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP
- 26. 26 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading microkernel (TDM) resource manager VL app. SM task task sch. application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP
- 27. 27 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading app 1 virtual platform specification & ELFs microkernel (TDM) resource manager 2 VL app. SM task task sch. application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP
- 28. 28 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading app 1 virtual platform specification & ELFs sys. app. SM task task sch. microkernel (TDM) resource manager boot loader application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP
- 29. 29 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 run-time loading RTOS app 1 virtual platform specification & ELFs FRT dataflow T1 T2 task sch. PM DF API ... ... VL app. SM task task sch. microkernel (TDM) resource manager ... application bundle hw bitstream app. ELFs virtual platform specification system bundle sys. ELFs phys. platform specification network on chip processor tiles memory tiles eFPGA DSP FRT dataflow T3 T4
- 30. 30 / The information contained in this document and any attachments are the property of FlexTiles consortium. You are hereby notified that any review, dissemination, distribution, copying or otherwise use of this document must be done in accordance with the CA of the project (TRT/DJ/624412785.2011). Template version 1.0 Questions Questions? Tuesday Evening: Demo Night •Interactive demonstration of the CompSOC platform •Including development done in Flextiles •DEMO 7